SAS Combinatorial Functions: Snippets

June 25, 2015
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1. Permutation and Combination data _null_;     n = 5;     r = 2;    *the factorial of a number;    fact=fact(n);    *for positive integers, fact(n) = gamma(n+1);    gamm=gamma(n + 1);    *C(n,r): number of combinations of n objects selected r ;    *n! / ;    comb1 = comb(n,r);    comb2...
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Pyramids, body parts, and gender differences

June 25, 2015
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Nope - we're not digging up mummies in pyramids and analyzing the gender - this blog is about population pyramid charts and "digging into data"! But since the title might have lured in some pyramid fans, here's a picture of my friend Angela posing beside a pyramid - pretty cool, eh?!?

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The (Mostly True) History of Computing

June 25, 2015
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The (Mostly True) History of Computing

I'm half way through a book that I simply must recommend to you before I even finish it. If you have a sense of humour or  if you have half an interest in the earliest evolution of computers, you will enjoy The Thrilling Adventures of Lovelace and Babbage by Sydney Padua...
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2 days. 2 exams. 2 SAS certifications.

June 24, 2015
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In just one weekend Shang-Hua Wu went from a SAS user to a super SAS user by getting not just one, but two SAS certifications – SAS Certified Base Programmer and SAS Certified Advanced Programmer. Wu wanted to earn his certifications to position himself for new career opportunities in the

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The sensitivity of Newton’s method to an initial guess

June 24, 2015
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The sensitivity of Newton’s method to an initial guess

In my article about finding an initial guess for root-finding algorithms, I stated that Newton's root-finding method "might not converge or might converge to a root that is far away from the root that you wanted to find." A reader wanted more information about that statement. I have previously shown

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New SAS Visual Analytics certification launched

June 23, 2015
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The SAS Global Certification program is proud to announce the release of a new credential: SAS Certified Visual Business Analyst Using SAS Visual Analytics. This credential is designed for analysts who are using SAS Visual Analytics to explore data and create insightful data visualizations. With SAS Visual Analytics now deployed in over

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What is SAS Studio? RIP Enterprise Guide?

June 23, 2015
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What is SAS Studio? RIP Enterprise Guide?

In recent weeks I've mentioned SAS Studio in passing but it's a strategic product for SAS and it merits a proper description.It's strategic because there is a clear trend for SAS to produce "thin" web-based user interfaces rather than "thick" applicati...
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Using SAS to get the jump on Shark Week

June 22, 2015
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Discovery Channel's Shark Week starts July 5, 2015 - and I've created a special SAS map & graph of shark attacks in North Carolina to get you in the mood for their week of shark education! But first, to get you in the mood for my blog, here's a picture

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Finding roots: Automating the search for an initial guess

June 22, 2015
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Finding roots: Automating the search for an initial guess

A SAS programmer asked an interesting question on a SAS Support Community. The programmer had a nonlinear function with 12 parameters. He also had file that contained 4,000 lines, where each line contained values for the 12 parameters. In other words, the file specified 4,000 different functions. The programmer wanted

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